When I go abroad, I take NEX (Narita EXpress) from Yokohama to Narita because it is punctual and easy to get the reserved seat ticket (all seats in NEX are reserved) on phone or via Internet.
And when I come back to Japan, I take the bus to Yokohama because it is eaier to get the bus ticket after tiring flight. Also I do not worry about being over slept in the bus.
About N'EX | Narita Express | JR-EAST
https://www.limousinebus.co.jp/en/bu...s/narita/index